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United States Patent | 5,018,733 |
Buand | May 28, 1991 |
A handgrip is described for a racket for ball games in which the grip body is surrounded by a grip sleeve and a ventilation chamber is formed between the grip sleeve and the grip body. For the purpose of obtaining a substantial damping of vibrations and oscillations at the ball impact moment provision is made that the volume of the ventilation chamber is variable by the pressure forces which are exerted by the hand of the respective player during the game, and that at least a part of the openings provided in the grip sleeve form an induction and/or explusion opening for the airflow which is brought about by the volume changes.
Inventors: | Buand; Thierry M. M. (Nantes, FR) |
Assignee: | S.A. Donnay International (Couvin, BE) |
Appl. No.: | 335920 |
Filed: | April 10, 1989 |
Current U.S. Class: | 473/550; 473/523 |
Intern'l Class: | A63F 049/08 |
Field of Search: | 273/75,73 J,73 C,67 D,67 DA,67 DB |
3311375 | Mar., 1967 | Onions | 273/75. |
3489031 | Jan., 1970 | Meier | 273/73. |
4537399 | Aug., 1985 | Adam | 273/75. |
Foreign Patent Documents | |||
2925629 | Jan., 1981 | DE | 273/73. |
3625929 | Feb., 1988 | DE | 273/73. |
2569567 | Mar., 1986 | FR | 273/75. |
1510626 | May., 1978 | GB | 273/75. |